Overview
The TL431ACZT is an adjustable shunt voltage reference produced by STMicroelectronics. This device is part of the TL431 series, known for its high temperature stability and adjustable output voltage. The TL431ACZT is particularly suited for applications requiring precise voltage regulation over a wide temperature range.
The device can be set to output any voltage between 2.5 and 36 V using two external resistors, making it highly versatile for various power supply and industrial applications. It also features a wide current range from 1 to 100 mA and a low typical dynamic impedance of 0.22 Ω.
Key Specifications
| Parameter | Unit | Min. | Typ. | Max. |
|---|---|---|---|---|
| Cathode to Anode Voltage (VKA) | V | - | - | 37 |
| Continuous Cathode Current (Ik) | mA | -100 | - | 150 |
| Reference Input Current (Iref) | mA | -0.05 | - | 10 |
| Operating Junction Temperature (TJ) | °C | - | - | 150 |
| Operating Ambient Temperature Range (TA) | °C | 0 | - | 70 |
| Reference Input Voltage (Vref) | V | 2.44 | 2.495 | 2.55 |
| Dynamic Impedance | Ω | - | 0.22 | - |
Key Features
- AEC-Q100 qualified for automotive applications
- Adjustable output voltage: 2.5 to 36 V
- Sink current capability: 1 to 100 mA
- Typical output impedance: 0.22 Ω
- 0.5% voltage precision (TL431B version), 1% and 2% voltage precision for other versions
- Automotive temperature range: -40 °C to +125 °C
Applications
- Power supply systems requiring precise voltage regulation
- Industrial control systems
- Automotive systems, especially those requiring high temperature stability
- General-purpose voltage reference applications
Q & A
- What is the adjustable output voltage range of the TL431ACZT?
The output voltage can be set to any value between 2.5 and 36 V using two external resistors.
- What is the typical dynamic impedance of the TL431ACZT?
The typical dynamic impedance is 0.22 Ω.
- What is the operating temperature range for the TL431ACZT?
The operating temperature range is from 0 °C to +70 °C for the TL431ACZT, with extended ranges for other versions.
- What is the maximum cathode current for the TL431ACZT?
The maximum continuous cathode current is 100 mA.
- Is the TL431ACZT AEC-Q100 qualified?
- What is the reference input voltage deviation over the temperature range?
The reference input voltage deviation over the temperature range is specified in the datasheet, typically within a few millivolts.
- What are the typical applications of the TL431ACZT?
- What is the thermal resistance junction to ambient for the TL431ACZT?
- How does the TL431ACZT achieve its adjustable output voltage?
- What is the storage temperature range for the TL431ACZT?
